Import csv rename user account is exists in AD

Question

ok, got an interesting one here. Might be easy i have no idea where to even begin with this one.
If have a web site that generates csv file to import into AD. No problem, works great.
I need to put in a check to see if the user/email account already exists in AD and if they do, append a 1 to the account.
then i want to check that appended account with the 1 to see if that exists, if it does add a 2 and so on until the account doesnt exist, then bam create it.
Has anyone done anything like this before ? Or can someone possibly point me in the right direction as far as coding would go.
I'm kind of a novice but diving in head first here.
Any help is appreciated
Thanks All 

Answer 1

here's what i got thus far. i haven't tested as of yet. looking for feedback first.
Import-Module ActiveDirectory
$files = Get-ChildItem -Path c:\new_users\*.csv
Foreach ($file in $files) {
Foreach ($user in(import-csv $file)) {
$username=$user.SamAccountName
$UserPrincipalName = $username + '@my-domain.COM'
$password='xxxxxxxxxx'
Foreach ($user in $files)
 ##Check if exist##
  $User = Get-ADUser -Filter {SamAccountName -eq $Entry}
  If ($User -eq $null) {
     New-ADUser -SamAccountName $user.SamAccountName -UserPrincipalName $UserPrincipalName -name $user.DisplayName -GivenName $user.GivenName -Initials $user.Initials -SurName $user.SurName -DisplayName $user.DisplayName -OfficePhone $user.OfficePhone
-EmailAddress $user.EmailAddress -Title $user.Title -Department $user.Department -Company $user.Company -profilePath $user.ScriptPath
  Else
  $Count = "0"
  While ($User -ne $null)                                                                          
    $Count ++                                                                                          
    [String]$Entry = $Entry.Substring(0,$string.Lenghth-1) + $Count                                                                                                                                                                                      
    $User = Get-ADUser -Filter {SamAccountName -eq $Entry}                                                                                                                                                                                    
  If ($User -eq $null)                                                                                                         
    New-ADUser -SamAccountName $user.SamAccountName -UserPrincipalName $UserPrincipalName -name $user.DisplayName -GivenName $user.GivenName -Initials $user.Initials -SurName $user.SurName -DisplayName $user.DisplayName -OfficePhone $user.OfficePhone
-EmailAddress $user.EmailAddress -Title $user.Title -Department $user.Department -Company $user.Company -profilePath $user.ScriptPath